update polymer, nodebind, and templatebinding

R=sigmund@google.com

Review URL: https://codereview.chromium.org//307793002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/observe@37066 260f80e4-7a28-3924-810f-c04153c831b5
4 files changed
tree: 638e9a24d1812dbd80f37aac0f27ba4e4181c61a
  1. lib/
  2. test/
  3. AUTHORS
  4. CHANGELOG.md
  5. LICENSE
  6. PATENTS
  7. pubspec.yaml